[TWC]

Hello, I?m new to the forum and looking for help. I have a 2007 Grizzly 700 that won?t start without spraying carb cleaner in breather. Grizzly runs and sounds great, but when you turn it off it will not start back. The injector is not opening on startup, but works perfect with some help carb cleaner or starting fluid. The injector is not getting the intermediate pulsing ground at startup. Anyone have any ideas that could help? Scratching my head can?t figure out.

 

[TWC]

My Grizzly is at a repair shop and the above information was given to me. They are not sure what it is and don't want to just throw parts at it. Stator has been replaced on it is the only repairs I know of by previous owner.

 

[reogem]

Hey...TWC...Welcome to GC from Wisconsin.

Do you have a service manual? That would be the best place to start.
Find out how to switch the speedo into diagnostic mode. Look for any codes that may have thrown. In diag mode you can also check the injector and the fuel pump. Consider checking th fuel pump pressure should be around 46psi.

 

[TWC]

Ok will order a service manual. I was hoping someone out there has had the same issue. If someone could tell me what controls the injector and tells it to spray at startup. Could it be the CDI? Shop said they can tap the ground with pulsing motion and it will start, manually grounding the injector.

 

[TWC]

I think the only code was for TPS, it has been replaced.

 

[guipago]

What is the TPS value at closed throttle? Have read that closed throttle value should be around 15-18% & full throttle at 100%( someone might know exact figures ) If your closed throttle reads a minus % it might cause a problem( this is a SWAG of course ) the other thing could be bad earths on the frame, a lot of frame & engine earths go straight onto a painted section of frame/engine & rely on the screw threads to earth the wire, the threads can become corroded giving a bad earth & untold nightmares.

 

[mainehunter]

Welcome to GC from Maine, hope you get it fixed!

 

[reogem]

You can test most of the components involved in the fuel injection system via the diag mode on the pod.

Considering the new info about the injector might indicate a worn/loose wire.

FYI.. the TPS should read 18-19 at closed throttle and 99-100 at WOT .
The range in the manual is much wider but typically you will find the range closer to what I posted.

Something weird...My car has been acting up lately similar to your ATV. Today I shot some carb cleaner in the air intake and it started up. After it started I could hear a snapping sound. Got my ear in very close found a leaking, sparking terminal at the coil pack. Sprayed it down with silicone. The snapping noise stopped, the engine smoothed out and it starts. Got to replace the plug wires and possibly the coil pack.

 

[TWC]

Shop has traced it back to the CDI box. I ordered one off Ebay. I hope this will fix it, I?m not 100% convinced yet. All ground connections were checked, they are leaning towards the CDI box. What do you all think?

 

[reogem]

Shop has traced it back to the CDI box. I ordered one off Ebay. I hope this will fix it, I?m not 100% convinced yet. All ground connections were checked, they are leaning towards the CDI box. What do you all think?

The ECU on the 700's are very reliable but it is a possibility. I always start with the easy simple cheap stuff then work my way toward the big buck items.

Hope that it works out.

 

[TWC]

Well I order the wrong thing. I ordered a piggyback CDI add on. Anyone out there have a good used CDI box for a 2007 Grizzly 700? Would like to borrow or purchase. Not 100% sure this is the problem, so don’t want to buy new...very expensive.

 

[guipago]

I think the only code was for TPS, it has been replaced.

Do you mean that the TPS has been changed or that the code has been cleared? Recheck for fault codes again cause a pinched wire will keep throwing the same fault code & keep giving you the same problem.(more SWAGS :grin2: )

 

[TWC]

Just got the ECU in and that did not fix the starting problem. Injector still not spraying at startup. All diagnostic test on injector checked good. What controls the startup spray of the injector? Shop unable to find the issue. Need some help please.

 

[reogem]

Just use one thread...which one do you want to use?

 

[TWC]

Anyone that can help figure this issue out.

 

[reogem]

You will get better results if you post in just ONE thread. I'm not wasting my time chasing your random posts.

 

[Grizzcrazy]

Anyone that can help figure this issue out.

Ok. First, let's take a step back and breath. I would PM dezz and see if he can help you out. He is very patient and knoledgeable.

You will get better results if you post in just ONE thread. I'm not wasting my time chasing your random posts.

Second, he is worried and frustrated and is looking to us for help. It's not fair just to shut him out when he needs help and doesn't know where to get it. That's what this forum is for. I can agree that maybe he should have started another thread, but he has disscussion in this one and was trying avoid taking more space on the thread list. It's not a good method, but getting mad and robbing him of help isn't the thing to do.

 

[megrizzly]

I gotta ask, but is this "shop" a Yamaha dealership or some sort of atv repair shop? If at all possible, try to get another grizzly 700 that runs fine and check your ecu and injector in it just to be sure.

Judging by the wiring diagram, if the injector and ecu are in fact fine, then the fuel pump or is next on the list.

 

[reogem]

......................

Second, he is worried and frustrated and is looking to us for help. It's not fair just to shut him out when he needs help and doesn't know where to get it. That's what this forum is for. I can agree that maybe he should have started another thread, but he has disscussion in this one and was trying avoid taking more space on the thread list. It's not a good method, but getting mad and robbing him of help isn't the thing to do.

I didn't suggest that TWC start another thread...TWC has another thread started. I posted in it earlier then he came back in this thread. He has ignored the questions we have posted trying to pin point the problem.


It is very simple and proven posting the same question in multiple threads results in confusion and frustration.

 

[Grizzcrazy]

It is very simple and proven posting the same question in multiple threads results in confusion and frustration.

Yes I agree. I'm sorry for getting in the way but I hate seeing friction build up that could maybe even ruin a thread. Thank you for explaining, I appreciate that.